Carburetor device



Aug. 4, 1959 SANG YUL AN 2,898,095

CARBURETOR DEVICE 4 Filed NOV. 19, 1956 INVEN TOR.

SANG YUL AN United States Patent CARBURETOR DEVICE Sang Yul An, Seoul, Korea Application November 19, 1956, Serial No. 623,065 1 Claim. (Cl. 261-23) This invention relates to a device for use with liquid fuel internal combustion engines and more particularly with a means for incorporation into the carburetion mechanism of such engines in order to bring about a more etficient utilization of the fuel.

It is a basic object of the invention to provide a device for use with internal combustion engines in which liquid fuel injected into a fuel feed conduit as a liquid is quickly broken into a multitude of tiny droplets or even rapidly vaporized, so that eflicient passage to the engine is obtained. 7

Other objects and advantages of the invention will in part be obvious and in part appear hereinafter.

The invention is embodied in a carburetion device which is characterized by the incorporation of a plurality of venturi-type conduits in a principal manifold so that, as air passes through the full assembly, it is subjected to acceleration in the several parts of the compound passage, thereby to cause it to mingle forcibly with an injected spray of liquid fuel and, in the zone of maximum turbulence thus created, to induce a dispersion of the liquid into a fine spray approaching outright vaporization of the liquid fuel.

In the drawings,

Figure 1 is an end view of a conduit having the device installed therein; and

Figure 2 is a section through said conduit taken along line 22 of Figure 1.

Referring now more specifically to the drawing 10 represents the wall of the conduit 11 through which an air fuel mixture must pass. Pivotally mounted valve 12 is set in the conduit 11 on axis 13 to permit the valve to open or close the passage. The body 10 is the main structural unit such as a manifold for the conduit 11. Associated with the apparatus is the fuel tank 15 which has fuel pump 16 connected thereto for delivering the fuel through the orifice 17. The detailed mechanism of the fuel pump 16 may be of any kind which will deliver the desired stream of fuel into the conduit 17. Conduit 17 has a plurality of side orifices 18, 19, etc. and is mounted in the larger passage 20 by threaded connection 21. The larger passage 20 is actually a part of the air passage 22 so that an air stream coming through passage 22 can mingle with fuel being ejected through the top of conduit 17 Within the main manifold 11 is mounted the novel discharge nozzle which consists of the body 30, which fundamentally is a trifurcated element having sections 31, 32 and 33, which are individual conduits characterized by their being internally shaped with a narrowed constriction identified, respectively, as 31', 32 and 33, so

Patented Aug. 4, 1959 that these individual conduits together form a compound conduit each portion of which has a venturi throat.

Connection to the fuel air nozzle mixture is made by side orifice 35 which passes through the central body of the unit 30 and at the center symmetrically branches at 36, 37 and 38 to each of the throats 31, 32 and 33', respectively. Side orifices 40, 41, 42 are provided in each of the individual conduits, the orifices being inclined in the direction of air flow.

In operation it will be observed that when valve 11 is open air flow will be in the direction of the arrows. Fuel pumped through the conduit 17 is mixed with air drawn through conduit 22 and injected forcibly, as a fuel-air mixture, through the orifice 35 into the trifurcated branch leading to each of the individual venturi-type conduits. Since the point of injection is close to the narrowest constriction 31', 32' and 33 of each of the individual throats, the fuel spray is mechanically further churned into a fine degree of subdivision by the high velocity turbulent air stream, and, to a certain extent, it is also vaporized.

The conduit 11 is made with a constriction at 11' to form a throat with subsequently tapered sides 11", thereby essentially to form a large venturi. Thus, the central complex orifice of several venturi-type throats is made to discharge into the main stream at a throat, or another point of high velocity and turbulence.

It will thus be seen that the insertion of the device consisting of the trifurcated compound venturi-type conduit in the line of flow produces a condition of turbulence in the air stream, all of which is conducive to a high degree of subdivision of the fuel injected into that stream. The result is the fuel air mixture reaching the engine is efficiently burned therein.

Though the invention has been described with reference to only a single embodiment, it is to be understood that it may be varied without departing from its spirit or scope.

What is claimed is:

A device for liquid fuel feed for internal combustion engines comprising, a main conduit for air flow supplying primary air to a carburetor conduit, a venturi throat in said carburetor conduit, said throat comprising symmetrical constriction in the circumference of said conduit, a plurality of venturi type conduits within said carburetor conduit supported longitudinally thereof symmetrically around a central axis, inlets for said plurality of conduits being in a plane close to the primary air intake for said carburetor conduit, discharges for said plurality of conduits being in a second plane substantially at the narrowest point of said venturi throat of said carburetor conduit, means for introducing a spray of liquid fuel individually into each of said plurality of conduits, said spray being introduced substantially at the constriction in each of said individual venturi throats thereby to induce an efficient turbulent mixing and subdivision of fuel and air in said conduit.

References Cited in the file of this patent UNITED STATES PATENTS 1,323,919 Sheldon Dec. 2, 1919 2,711,886 Biver June 28, 1955 4,503 Heisler Aug. 2, 1955 2,735,664 Gamble Feb. 21, 1956 

